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A155370
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Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,1 3,1 4,1 4,2 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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%I #3 Mar 31 2012 12:35:23
%S 1,7,19,37,124,545,2932,15809,100710,785638,7143835,76372256,
%T 962177079,14293799953,248275319618
%N Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,1 3,1 4,1 4,2 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.
%e Maximal 10 X 10 X 10 example
%e ............0
%e ...........0.0
%e ..........1.1.0
%e .........0.1.1.0
%e ........0.0.0.1.1
%e .......0.0.0.0.1.1
%e ......0.1.1.0.0.0.0
%e .....0.1.1.0.1.1.0.0
%e ....1.1.0.0.0.1.1.1.1
%e ...1.1.0.0.0.0.0.0.1.1
%K nonn
%O 5,2
%A _R. H. Hardin_ Jan 22 2009
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